Weighing-scale poise



E. Vf/f# i Heeres, 35%' a MM `Mmh'26 ,-1929. o. c. REEVES 1,106,964

WEIGHING SCALE P01515:v

Filed June 16.1926

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Patented Mar. 26, 1929.

uruiEn STATES PATENT OFFICE.

OBIWELL C: REEVES, OF TOLEDO, OI-IIO, ASSIGNOR T0 TOLEDO SCALE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

WEIGHING-SCALE IPOISE.

Application led .Tune 16,

This invention relates to indicating devices, and more particularly to indicating devices for weighing scale poises. The practice of weighing comparatively heavy loads ot commodities has brought about the use ot weighing scale beams carrying heavy poiscs, the slightest change or' position of which corresponds to a considerable change oi load, while the increasing values per unit of weight et the `commodities mak-e it espe- ;ially desirable that the poises be accurately positioned upon the beam and their positions accurately noted. It, for example, the commodity to be weighed be placed upon the scale platform in a suitable container, thev known weight of the container being 62 lbs., and in offsetting the weight of the container by means or a poise the latter be set at 6 1 lbs., the scale may indicate that the load is i25 lbs., when, in fact, the true weight 1s 12a lbs. Even when the beam is connected to an automatic load-counterbalancing mechanism of the most accurate type such errors will. occur it the poise is not accurately positioned on the beam.

@ne of the principal objects of this invention is the provision of means whereby a poise may be easily and accurately positioned upon a scale beam in a .minimum length oi time.

nother object of the invention is the provision ot an index and sighting means 'for a scale poise which will prevent errors caused by parallax, or the `erroneous positioning oit a poise by an operator who not standing directly in front oi the scale.

Still another object is the provision of a poise equipped with an index and sighting means operating in conjunction with a magnifying lense i'or the purpose et increasing the ease and accuracy with which the poise may be positioned upon a beam.

Other objects and advantages will be apparent from the following description, in whichreterence is had to the accompanying drawings illustrating preferred embodiments ot my invention and wherein similar reference numerals designateV similar partsV throughout the several views.

In the drawings Figure I is a fragmentary front elevational view of a portion of an automatic 1926. Serial No. 116,397.

weighing scale showing beam and poise mechanism embodying my invention; Figure II is an enlarged fragmentary isometric view ot the poise ot my invention; Figure III is a transverse sectional view through the poise illustrated in Figure II; Figure IV is a transverse sectional view through a poise showing a modified form ot my invention; y

Figure V is a horizontal sectional view through the poise taken substantially on the line V-V ot Figure IV; and

Figure VI isla transverse sectional. View through a poise showing another 'form ofA the invention.

Referring to the drawings in detail, the frame oif the scale illustrated in Figure I is shown as an upright column l erected upon a suitable base (not shown) which support,l and houses the platform lever mechanism. The column l is surmounted by a watchcase-shaped casing 2 suitably supporting and enclosing automatic load-counterbalancing mechanism of any suitable type (not shown). A lever 3 ulcrumed withiny the column 1 is operatively connected to the platform lever and automatic load-counterbalancing mechanisms, the lever being provided with a pair of beams 6 equipped with poises 7'. It is to be understood, however, that the device of my invention operates in exactly the same way in scales in which no vautomatic load-counterbalancing mechanism is employed.

The prelierred form ot the poise structure illustrated in Figures II and III consists of a rectangular body portion S and a'i'rame 9, the latter having a comparatively large sight opening l0 through which the graduations vl1 on the beam 6 are rendered easily visible to the operator, the body portion and iframe being suitably held together by means oit screws (not shown). The body 8 ofthe .f

poise is preferably made in shell-like .torni and i'illed with lead 12 or other sealing material to the desired weight. The :trame 9 is provided with a recess which receives a glass plate 14; held in place by means of a retaining plate 15 secured to the poise 'trame 9 by means of screws 16. The rear surface of the la in juxtaposition with the beam 6 is provided with a vertically extendine' index line 17, and the front surface of the glass is provided with a sighting` line 18 so that an operator in setting` the poise may, with ease, bring' his eye into alignment with the index and sighting Wires 17 and 18 and be assured that he is obtaining a correct reading oll the position oi.E the poise, as the errors of parallax attendant in setting; a poise of the usual construction are not present. The lines upon the glass may be 'very minute grooves or hair line channels ground or otherwise etched thereon. Vhen the eye oit the observer is in the imaginary plane passing; through the index and sighting;` lines, the lines apparently blend into a single readinidY index eipiivalent to vthe thiol; ness of one line and the Agradnation on the vbeam in visual coincidence with the lines upon the poise glass rei'n'esents the exactposition et the poise. If the observer should move to a position in which his eye is not in the plane passing` through the index and sinhtinp' Wires, he is inurediately apprised of the Vmet, as the lines 1T and 18 appear to separate, indicatine' that the operator is not in the proper position to accurately position the poise.

In the modified form of the poise shown in Figures IV and V the poise iframe 9 provided with a magnifying,` lens 14E in lieu oitl the plane surfaced window which is held in place by the supplemental 'frame 1t. The supplemental rame15 is provided with a plurality of comparatively small guide openings 18 through which is stretched a Wire, forming a reading and sighting index 17 and 18', answering' the same purpose as the lines upon the glass lei. The Wire is maintained in a state of tension by means of a contractile spring,- 20. The incorporation ot' the lens 14 in a poise of this type is particularly advantageous as it causes the ygraduations upon the beam to be magniiied and appear further apart, thus obviously .makinn' it easier to properly position the poise.

Another Form of the poisev is illustra ted in Figure VI. The supplemental 'frame 15 employed in retaining the lens or glass 1st in the poise is provided with a pair oit' small' openings through which is stretched an index Wire 17, the Wire being' held in a state oi tension by means of a spring 20. Sighting; means is provided comprising; a hair line etched upon the rear suriace of the ,glass or lens 14k so that the observer is enabled to properly set the poise by bringing' his eye into coincidence With the plane passing through the index Wire and sightin` hair line.

The embodiments of my invention herein shown and described are te be regarded as illustrative only, and it is to be understood that the invention is susceptible to variation, modilication and change Within the spirit and scope oi the subjoined claims.

Having' described my invention, I claim:

1. In a device of the class described, in combination, 'weighingmechanism including` a beam, a poise cai-operating' with said beam, and reading and sighting indices carried by said poise and adapted to co-operate vfith said beam.

9,. In a device of the class described, in combination, a beam, a poise co-operating with said beam, a. glazed opening' in said poise, and an index carried by said poise and adapted to (io-operate with said beam.

3. In a device oli the class described, in combination, a beam, a. poise co-operatiiu with said beam, a glazed opening in said poise, and reading and sighting,` imlices carried by said poise.

4L. In a device of the class described, in combination, beam, a poise slidably cooperating with said beam, Traductions upon said beam, and reading` and sighting iinlices carried' by said poise and adapted to co-egerate with said ggjraduated beam.

In a de ice of the class described, in combination, a graduated beam, a poise cooperating with said beam, reading-r and sightine` indices carried by said poise, and means 'for maintaining' said ind'ces in proper relation to said poise.

6. In device or the class described, in combination, a. beam, a poise cooperating with said beam, a glazed openingyv in. said poise, and reading and sighting; indices carried by saic poise.

7. In device of the class described, in combination, a beam, a poise cti-operating With said beam, an opening' in said poise, a transparent member in said opening', and ay reading' index inscribed upon said traumparent member.

8. In a device oi" the class described. in combination, a beam, a poise m-opcratine with said beam, an ojriening' in said poise, a transparent member in said opening. and reai'lina' and sighting' .indices inscribed upon said transp( rent member.

9. In a device ot the class descril ed, Ain combination, a graduated beam, a poise cooperating with said beam, an opening in said poise, a transparent member, and reading and sighting indices carried by said poise and adapted to co-opera'te 'with said graduated beam.

10. In a device of the class described, in combination, a graduateil beam, a poise cooperating with said beam, a magnifying' lens supported by said poise, and reading and sighting, indices carried bv said poise.

ORIVELL C. REEVES. 

